texconfig
Configure TeX Live or teTeX. tldr-pages
On several platforms
Several platforms
Configure TeX Live or teTeX. Superseded in many cases by tlmgr.
Display the current TeX configuration
texconfig confIdentifySet the default paper size for supported programs
texconfig paper a4IdentifySet the default paper size for PDFTeX
texconfig pdftex paper a4IdentifyRebuild all TeX formats and font maps
texconfig initIdentifyRebuild a specific format
texconfig init formatIdentifyRefresh the TeX filename database
texconfig rehashIdentify